Yup, exactly as stated:
1) With car already warm (so that u can drive off and immediately pound on the throttle afterwards and feel the difference =P )
2) Turn key to position 2 for approximately ten seconds (position 3 = firing up the car)
3) Turn key to position 0 for approximately ten seconds (but don't take it out of the ignition)
4) Turn key all the way to position 3 and start the car

If you fear that u may have done it incorrectly, just take the key out of the ignition for a few seconds and repeat the above steps.

The throttle should feel "new" and responsive again, almost as if sport mode is on, but it's not actually =]
You can then turn on sport mode, turn off DSC, and go soil your pants thereafter ^_^